Let us talk Nitrous Oxide

[Ariel Badger]

I am thinking of running NOX on a methanol fueled carbed bike. What do I need to know?
____________________
Bikers make great organ donors, get 115 on your licence today.

[_Iain_]

https://t.qkme.me/3s5bz8.jpg

Surely the same as any other wet setup? One injector for the fuel, one for the gas. Balance in the right proportions for win, balance in the wrong proportions for melty engine internals.

Perhaps worth contacting wizards of nos themselves & seeing what they've got to say about it all?
____________________
Please be aware that the above post may be full of complete nonsense.
Riding: '07 KTM Duke II, Baotian BT49QT-20 Driving: '88 Volvo 340

[Clutchy]

Thread has potential...
____________________
Malaguti F12 Phantom-Dead, Suzuki AY50- Dead, NRG power DD LQ, CBR125.
*33 BHP restriction up on 10/12/14* Current bikes/car: SV 650 S/ MKIV GOLF
Guide to pass your test with no lessons!

[Frost]

Nitromethane not an option?

[Pete.]

[SteveZZR]

[UnknownStuntm...]

What CC? if it's less than a 500 you might struggle to get small enough jets, but I reckon the best thing to do is contact Wizards of NOS or whomever they are...

I had a similar idea to convert a chainsaw engine a while back, but I couldn't find a small enough jet to do the work.

Oh, and KNOW where your fire extinguishers are, and KNOW what a fire 'without flames' looks like.

[ssray]

Here you go https://www.nitrous.info/

[stevo as b4]

Make sure you don't drive over your crankshaft though!

[mudcow007]

nitrous oxide....you having a laugh?




see what i did there

[stinkwheel]

Will it work well through a wide open bellmouth or would it be better having some sort of airbox?

Or of course, forced induction.
____________________
“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[SteveZZR]

[Ariel Badger]

Thanks people, it is an option I am looking to fit on my Jawa powered sprint bike. 500cc single with 15:1 CR.
____________________
Bikers make great organ donors, get 115 on your licence today.

[Robby]

On that CR, I assume you're running close to hydraulic locking the engine as it is. Add in another shot of methanol to go with the gas and you're going to have a lot of fluid in the cylinder.

*Note for children. Methanol has a very high octane rating, but a very low energy density. This means that it is very good as resisting knock and can run at a high compression ratio, but you need to squirt in a lot more of it. This mean hydraulic lock is a worry, because you squirt a lot of fluid into a much smaller combustion chamber.

[Ariel Badger]

We over jet with methanol to keep the motor from cooking a piston, running dope rich does not have the same consequences as petrol so it will not get boggy. This bike has a 800 jet and I imagine it will do about 4 mpg.
____________________
Bikers make great organ donors, get 115 on your licence today.

[Pete.]

Methanol stoichometric ratio is 6.4:1 compared to 14.7:1 for petrol. Burt munro reportedly melted a few engines one year because he didn't understand this.

15:1 is a helluva CR to be adding nitrous though. you got a bronze skull in that puppy?
____________________
a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[Ariel Badger]

You think it could blow the head off Pete? I will build provision into the frame and engine plates to clamp it on.
I am used to running on dope, it is NO2 that I am clueless with!
____________________
Bikers make great organ donors, get 115 on your licence today.

[Pete.]

Main thing to remember is that upping the oxygen content increases the rate of burn a lot, effectively advancing the timing. So not only do you get a much bigger bang, it also comes in too early. Cylinder pressures skyrocket which is why you don't really want it activated until you're well up the rev range and with almost full throttle (because elevating the cylinder pressures at low revs increases the duration of that huge strain on the mechanical components) There's little point applying nitrous if the throttle is part-open - you might as well just use more throttle and save the gas for when there's no more throttle to add.

Can't help you at all with using it alongside dope Wali. What little I know is pretty-much contained above.

Skulls are fitted to stop the ally of the head melting around the valve seats, and since the seats are formed into the skull, there's no chance of a seat falling out.
____________________
a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[Shaft]

Is the engine up to it?

They blow up for a hobby in the state of tune speedway riders run them in, so you have to ask yourself if it can take much more.

Having said that, you aren't limited to non exotic materials like speedway is, so I guess you could chuck some titanium in there.
____________________
Things get better with age; I'm close to being magnificent........
20 RE Interceptor, 83 Z1100A3, 83 GS650 Katana
WooHoo, I'm a Man Point Millionaire! https://www.bikechatforums.com/viewtopic.php?t=234035